| isolation and identification of rickettsia massiliae from rhipicephalus sanguineus ticks collected in arizona. | twenty rhipicephalus sanguineus ticks collected in eastern arizona were tested by pcr assay to establish their infection rate with spotted fever group rickettsiae. with a nested pcr assay which detects a fragment of the rickettsia genus-specific 17-kda antigen gene (htra), five ticks (25%) were found to contain rickettsial dna. one rickettsial isolate was obtained from these ticks by inoculating a suspension of a triturated tick into monolayers of vero e6 monkey kidney cells and xtc-2 clawed toa ... | 2006 | 16885311 |
| spotted fever group rickettsial infection in dogs from eastern arizona: how long has it been there? | a serosurvey of free-roaming dogs for antibodies to spotted fever group rickettsiae was conducted using archival samples that had been collected in the white mountain region of eastern arizona during a plague study in 1996. immunoglobulin g antibodies to rickettsia rickettsii (5.1%) and to r. rhipicephali (3.6%) were demonstrated, and no cross-reactive samples were identified. this study indicates that r. rickettsii was likely present in the dog populations in this area prior to the recognition ... | 2006 | 17114769 |
| detection of rickettsia rickettsii and bartonella henselae in rhipicephalus sanguineus ticks from california. | sixty-two questing adult rhipicephalus sanguineus (latreille) ticks were collected by direct removal from blades of turfgrass and adjacent concrete walkways at a suburban home in riverside county, ca, and tested for the presence of rickettsia, bartonella, and ehrlichia dna. polymerase chain reaction (pcr) was used to amplify fragments of the 17-kda antigen gene and the rompa gene of the spotted fever group rickettsiae. one male tick contained r. rickettsii dna; its genotype differed from r. rick ... | 2007 | 17294935 |
| high prevalence of tick-borne pathogens in dogs from an indian reservation in northeastern arizona. | we evaluated the serological and molecular prevalence of selected organisms in 145 dogs during late spring (may/june) of 2005 and in 88 dogs during winter (february) of 2007 from the hopi indian reservation. additionally, in 2005, 442 ticks attached to dogs were collected and identified as rhipicephalus sanguineus. infection with or exposure to at least one organism was detected in 69% and 66% of the dogs in may/june 2005 and february 2007, respectively. exposure to spotted fever group (sfg) ric ... | 2010 | 19469667 |
| evidence of exposure to spotted fever group rickettsiae among arizona dogs outside a previously documented outbreak area. | since 2003, two communities in eastern arizona have experienced a sustained outbreak of rocky mountain spotted fever (rmsf), caused by rickettsia rickettsii, associated with transmission by rhipicephalus sanguineus, the brown dog tick; 70 human cases, including eight deaths, were reported from these communities during 2003 through 2008. in both of the affected communities, antibodies to spotted fever group rickettsiae (sfgr) were present in dogs before the notice of the first human cases, sugges ... | 2011 | 20042069 |